<div class="row w">
    <nav class="col-md-2 h">
        <div class="nav flex-column">
            <a class="nav-link  active content " [routerLink]="['user']">用户管理</a>
            <a class="nav-link content " [routerLink]="['product']">产品管理</a>
            <a class="nav-link content " [routerLink]="['exit']">设置</a>
        </div>

    </nav>
    <div class="col-md-10">
        <router-outlet></router-outlet>
    </div>
</div>